一种时变移动信道中的相干多径来波方向估计算法

A Direction-of-Arrival Estimation Algorithm of Coherent Multipath Signals in Time-Varying Mobile Channel

基于菲涅尔区平板聚焦多波束天线模型 ,提出一种联合子空间平滑和子阵波束空间处理的来波方向估计算法。该算法可以解决时变移动信道环境中相干多径信号的来波方向估计问题 ,并克服了空间平滑方法的来波数目限制 ,同时具有较低的处理复杂度。对该算法进行计算机仿真 ,结果表明 ,在低信噪比门限和小样本数条件下 ,该算法还具有较好的估计精度和分辨力。

Based on Fresnel-zone multiple-beam antennas (FMBA), a novel direction-of-arrival estimation (DOAE) algorithm of coherent signal in a mobile radio propagation environment is proposed in this paper. The DOAE approach, which combines subspace smoothing technique and sub-array beam-space processing, solves the limitation of maximum DOAs of spatial-processing. It also has a higher resolution and accuracy in the condition of on low SNR threshold and small snapshots is number. Finally, computer simulation is performed and results suggest that in the condition of this method has a distinguished performance. So it is applicable to mobile communication systems.